CORROSION SCIENCE
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2024
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IF 7.4
Kangwei Gongsun,Xiang Gao,Kanglu Feng,Boyu Yuan,Juan Qiu,Chunchao Chen,Chen Sang,Chao Wang,Houyi Ma
A nanoscale ternary layer-by-layer self-assembly (LbL) thin film was fabricated on brass via a simple dipping method. Dual driving force of intermolecular interactions and coordination realized the high homogeneous dispersion of Ce 3+ , thereby improving the controlled distribution and release of inhibitors. Compared to previous nanometer-thick conversion coatings , ternary LbL film exhibited excellent multifunctional corrosion protection . The maximum strengthening reached 496.8 % in impendence, and corrosion inhibition efficiency remained 95.0 % after a 10-day exposure in 3.5 wt% NaCl. These improvements originated from dynamic barrier effect by crosslinked gel film of PA/PAH and the surface passivation through interface deposition of Ce species.
研究领域:
材料科学
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表面工程
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腐蚀与防护
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 49
·期 37
·13160-13166
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IF 4.174
Yali Yu,Qingqing Zhang,Heng Gao,Chenxiao Yan,Xiong Zheng,Tong Yang,Xiaoshun Zhou,Yong Shao
G-quadruplex DNAs (G4s) have been reported to exhibit the DNAzyme activities by binding with some metal complexes and functional organic ligands. However, there is a challenge to develop metalloenzyme-mimic G4-based innate DNAzymes using the complexed metal ions directly serving as the active centers. This will diversify DNAzymes for developing novel devices since G4 structures are more polymorphic than the other DNA foldings. In this work, we found that the lanthanide trivalent cerium ion of Ce3+ can bind to the human telomere G4 (htG4) according to a 1 : 2 binding mode favorable for creating metalloenzymes-mimic G4 DNAzymes. This Ce3+-G4 entity exhibits a peroxidase activity towards the oxidation of the substrate of 3,3,5,5-tetramethylbenzidine (TMB) by hydrogen peroxide. The 5′ G4 tetrads with the orderly arranged carbonyl oxygen atoms are believed to be the coordination sites for Ce3+ and favor the conversion between Ce3+ and Ce4+. Our work provides an alternative feasibility in developing the G4-based innate DNAzymes for variant applications.
研究领域:
生物化学
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分子生物学
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催化
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核酸化学
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
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2021
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IF 5.097
Fang-Nan Wu,Jian Zhu,Guo-Jun Weng,Jian-Jun Li,Jun-Wu Zhao
In this work, a tyrosine-decorated gold nanocluster (Tyr-GNC)–cerium(III) complex was established for the fluorescent detection of dopamine (DA). Tris–HCl buffer was used for synthesizing Tyr-GNC; thus, Tyr-GNC could emit fluorescence even under neutral conditions. The quantum yield (QY) of Tyr-GNC was 13.3%. Trivalent cerium ions (Ce3+) chelated hydroxyl and amino groups of tyrosine to form GNC–Ce3+. Also, DA showed a higher quenching efficiency in the fluorescence of GNC–Ce3+ than that of GNC. The mechanism was that Ce3+ chelated with DA and promoted its oxidative self-aggregation under alkaline buffer, and, at the same time, the oxidative product quenched the fluorescence of Tyr-GNC by the inner filter effect (IFE). In DA detection, GNC–Ce3+ showed a wide detection range (0.1–1000 μM) and a low detection limit (10.85 nM) for DA with high selectivity. The platform was successfully applied to DA detection in human plasma. This work proposed insight into the interaction between GNC–Ce3+ and DA, which has broad application prospects in clinical diagnosis.
研究领域:
纳米技术
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分析化学
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生物医学工程
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临床诊断
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产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2025
·
IF 8.5
Chengyu Wang,Xinyu Zhang,Ming Cheng,Wentao Zhou,Yafei Wang
It is well established that the oxidizing species with high redox potentials could initiate and significantly accelerate the structural material corrosion in molten salt. However, here we found that the presence of Ce 3+ , an electrochemically less active cation, in LiCl-KCl eutectic molten salt could also enhance alloy corrosion. This effect was demonstrated through the corrosion behavior study of Inconel 600 alloy exposed to LiCl-KCl eutectic melt containing varying concentrations of CeCl 3 at 500 °C under an inert Ar atmosphere. The corrosion behavior study was performed by both the static immersion corrosion tests and electrochemical analyses. As the concentration of CeCl 3 increases from 0.5 wt% to 5 wt% and 10 wt%, the corrosion depth increases from 3.43 μm to 16.00 μm and 18.86 μm, leading to progressively severe wormhole corrosion due to chromium dissolution. The enhanced corrosion mechanism of Inconel 600 alloy was attributed to the formation of CeOCl driven by trace oxygen present in the Ar atmosphere. This study highlights the previously underestimated role of less oxidizing metal species in molten salt corrosion and provides new insights for the future study in molten salt applications.
研究领域:
材料科学
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腐蚀工程
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电化学
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核工程
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冶金学
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产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
·
IF 5.1
Xiaohui An,Ze Zhang,Hehua Zhang,Xin Xu,Tong Shen,Yuting Zhang,Xiaoyi Yang,Yiyang Fan,Hongzhi Pan,Dong Chang
Early diagnosis and treatment can significantly enhance the prognosis of patients with non-small cell lung cancer (NSCLC); however, current diagnostic methods remain plagued by inadequate sensitivity or excessive invasiveness. This study describes the innovative construction of a dual-fluorescence, dual-target biosensor based on copper nanoclusters (CuNCs) and hollow mesoporous silica nanospheres (HMSNs) for highly sensitive detection of CD91 and CD151 on the surface of NSCLC exosomes. Specifically, HMSNs regulate the fluorescence signals of red and blue glutathione-CuNCs by loading Ce 3+ and Fe 3+ and conjugating a pH-responsive chitosan coating: Ce 3+ significantly enhances the fluorescence signal of red CuNCs by inducing their aggregation, whereas Fe 3+ quenches the fluorescence signal of blue CuNCs through oxidation. Exosomes are captured using a CD63 aptamer conjugated to streptavidin magnetic beads. HMSN-Ce 3+ -CS-antiCD151 and HMSN-Fe 3+ -CS-antiCD91 probes are then employed to target exosome surface proteins CD151 and CD91, respectively, allowing synchronous detection of dual-fluorescence and dual targets. We then measured and analyzed the change ratio of fluorescence signals, and optimized the detection parameters while evaluating the sensitivity, stability, and linear range of the system. The detection limits of red and blue fluorescence systems were 1058 particles·mL −1 and 239 particles·mL −1 , and ranges of linearity were 4 × 10 3 –4 × 10 8 particles·mL −1 and 7 × 10 2 –7 × 10 6 particles·mL −1 , respectively. Overall, this study introduces a novel strategy for the early screening of NSCLC, with high sensitivity and minimal invasiveness. The complementary design of the dual-fluorescence system extends its detection range and holds potential for clinical application.
研究领域:
生物传感器
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纳米技术
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癌症诊断
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生物化学
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材料科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）